Typewriter



J. H. BARR Oct. 25, 1932.

TYPEWRITER Filed Jan. 5l, 1931 2 Sheets-Sheet l Oct. 25, 1932.

J. H. BARR TYPEWRITER Filed Jan. 3l, 1931 2 Sheets-Sheet 2 ff 'gw a j E 'lll/111111111 Patented oct. 25, 1932 i UNITED STATES PATENT orFicE JOHN I-I. BARR, OF ITHACA, NEW YORK, ASSIGNOR TO BARR-TEORSE CORPORATION, OF ITHACA, NEW YORK, A CORPORATION OF NE'W YORK TYPEWRITER Application tiled January 31, 1931 Serial No. 512,544.

This invention relates to typewriters, and particularly to the controlof the ribbon of the same.

In the preparation of stencil sheets in a typewriter, the type keys print directly on the stencil sheet, and it is therefore necessary to keep the ribbon out of printing position while typing upon the stencil sheet. It is also needless to feed the ribbon endwise when it is not in use, such as while typing upon a stencil sheet. j

Another object of the invention is to generally` improve the control of the ribbon movements of the typewriter, and enable the ribbon to be incapacitated in a simple manner, whenever one decides to type stencils.

Another object of this invention is to provide an improved typewriter in which the ribbon maybe kept out of printing position 210 and stationary while stencils are being typed; with which the machine may be adapted for ordinary typing or for the cuttingvof stencils by simple adjustments; with which such adjustments may be easily andquickly made;

and which will be relatively simple, compact,

practical and inexpensive.

Various other objects and advantages willV be apparent from the following description of an embodiment of the inventionand the 370 novel lfeatures will be particularlypointed Yont hereinafter in connectionwith the appended claims.`

in the accompanying drawings:

Fig. 1 is a.y plan of the underface of part of the base of a typewriter which is constructed in accordance with this invention, the parts being in the positions occupied when the typewriter is used for ordinary typewriting;

Fig. 2 is a similar plan, but with the parts in the positions occupied when the machine is set 'for the typing of stencils;

3 is a sectional elevation of the same, with the section taken approximately along the line 3 3 of Fig. 1;

' d is a sectional elevation similar to Fig. 3', but with the parts in the positions occupied as shown in Fig. 2;

Fic: 5 is a perspective of certain of the elements controlling the operation of the spindles 20, arranged at opposite sides of thek Fig. 6 is a section taken on line 6--6 Fig. 3; Fig. 7 is a diagrammatic sectional elevation of some ot the details of the printing means; and

` Fig. 8 is a perspective of some of the mechf anism shown in Fig. 2.

In the illustrated' embodiment of the invention, the typewriter includes a base or frame 1, on which the various parts are mounted. A ribbon guide or vibrator 2 (Figs. 3 and 4) isY mounted for reciprocation on the segment 3. and the ribbon 4 is guided by the upper end of the vibrator 2 in the usual manner, so that when the guide 2 is reciprocated on the segment 3, the ribbon will be shifted into and out of printing position. The printing mechanism includes any desired number of type bars 5, (Fig. 7.) which are pivotally attached to the segment 3, and rocked by levers 6 hav ing apin and slot connection Tthereto. The levers 6. are pivoted at 8, and carry pins or studs 9 which are received inslots 10 of driver members 11.

The driver members 11 are slidingly' mounted at one end by slots 12 and at their other ends are pivotally connected to levers 13. Each lever 13 is pivoted on a spindle 14 and is connected to an operating key 15 having operatingbutton 16..` The. key 15 is pivotally connected to the lever 13 and .is also pivotally connected to a link 17 which is piv` oted on a rod 18. The details of the printing mechanism, per se, form no part of the present invention, and' reference may be had to applicants Patent 1,67 4,27 3 issued June 19, 1928, forv a more complete disclosure of such printing mechanism.

rEhe ribbon 4L is connected to ribbon spools 19, Figs. 1 and 2, which are mounted upon 9Gl base or frame 1. Each spindle 20 has a driving gear wheel 20a, by which it is rotated.l A member 21 is rockably mounted, intermediateot Vits ends upon a stud 22 which is disposedbetween the spindles 20 and threaded intov said base.

The member 21 rotatably supports a shaft 23, and the latter carries worm gears 24 which mesh with and drive the gear wheels 20o, l alternately, when the member 21y is 100 rocked upon the stud 22. The shaft 23 is rotated by means of a gear 25, fixed thereon adjacent the stud 22 and meshing with a crown wheel 26 of a drive shaft 27 which is connected to the carriage escapement mechanism, ,'(not shown).

The shaft 27 is rotated step by step in accordance with the letter spacing travel of the carriage under the control of the escapement mechanism, and the gears 24 will alternately mesh with and drive the gear wheels a, and thus feed the ribbon endwise, alternately in opposite directions. For a full disclosure of such ribbon feeding mechanism, reference may be had to applicants Patent Number 1,717,362,`issued June 18, 1929, and applicants copending application Serial Number 453,444 filed May 19, 1930. The member 21 invrocking to disengage its shaft 23 from one gear wheel 20a and mesh it with the other, moves through an intermediate or neutral position which is shown in Fig. 2, in which intermediate position both of the gears 24 are disengaged from both the gear wheels 20a. At such times the ribbon will not be fed endwise in either direction.

The mechanism for vibrating the ribbon guide 2, is fully disclosed in my copending application Serial Number 181,542 filed April 6, 1927, and includes ak sub-frame 28, Flgs, 3, 4 and 5, which is attached to the base or frame 1 in any suitable manner, such as by screws 29. A lever is pivoted at 31 to thesub-frame 28 and at its other end is provided wth a slot 32 which receives a pin 33 projecting from a laterally extending lug 34 of the guide 2. Oscillation of the lever 30, aboutthe ivot 31, vibrates the ribbon guide 2 with its r1 bon into and out of printing position.

A link 35 is pivoted at one end by a pin 36 to the lever 30, and at its other end is pivoted by a .pin 37 to one end of a link 38, the other end of the link 38 being pivoted at 39 to one en'd'of a. link 40see also Fig. 5. The other end of the link 40 is pivotally attached to theframe 28 and coupled to an oscillating shaft 41 by which the link 40 may be given oscillation. The sha ft 41 is oscillated bylmeans of an arm 42 and a link 43 which connects it to a manually operated lever 44. The shaft 41 has an offset or crank section 41a to which is connected a spring 41?) which passes thru dead 'center intermediate the limits .of rockin of the shaft 41, so as to hold the shaft yiel ingly at either limit of its rocking movement. f

A spacing collar 45 may be mounted on the pivot 39 between the links 38 and 40, and the collar 45 (Figs. 3 and 4) is received in a slot or notch 46 in the sub-frame 28. The engagement of the collar 45 with the ends of the slot 46limits the oscillation of the link 40 and thereby the extent of swinging movement of the 'pivot 39. A lever 47 is pivotally connected at one end, by a pin 48 to a link 49, the other end of the link 49 being pivoted on the pin 37 which connects the links 35 and 38. The fulcrum of the lever 47 is a pin 50, provided at its lower end and movable along a slot 51 in a portion of the sub-frame 28 whlch depends through a slot or aperture 52 in the base 1.

A rod or link 53 has an angular end 54, see Fig. 6, which passes through an aperture in the lever 47, part way between the pins 48 and 50. The angular end 54 may be provided wth an annular groove 55,whichis receivedir. a notch in one edge of a leaf spring 56. The spring 56 is anchored at one end, such as by a rivet 57, to the lever 47. The spring 56 is provided with flanges 58 which extend around the side edges of the lever 47, and prevent rotation of the spring 56 about the rivet 57. The spring 56 is biased resiliently into a position closely against the lever 47 but may be sprung outwardly to an extent necessary to disengage the flanges 58 from the lever 47. The spring 56 may then be rotatedy about rivet 57 suilicient to disengage it from the notch in the angular end 54 of the link 53. lVith the spring in this position the angular end 54 is free to be removed or inserted in the aperture in lever 47.

The other end of the rod or link 53 is pivotally connected to a universal bar 59 which is disposed in a position to be operated by the drivers 11 of the printing mechanism. For this purpose the universal bar is disposed across the ends of all the drivers 11 of the printing mechanism, and whenever a type key 16, Fig. 7, is depressed to operate a type bar 5 into printing position, the driver 11 of that type bar will operate the universal bar 59 and through it rock the lever 47 about the fulcrum 50. This causes a movement of the pin 37 connecting the links 35 and 38, toward the right in Figs. 3 and 4.

The links 35 and 38 constitute what may be termed a to le device or toggle means, and therefore when the pin 37 connecting the links of the toggle device is moved towards the line connecting the other pivoted ends of the toggle links or levers 35 and 38, the toggl'.` device will be straightened. This straightening of the toggle device causes an upward movement of the lever 30 and through it a movement of the ribbon into printing position. When the printing means starts its rcturn movement towards initial position. the universal bar 59 will be released and will be returned to its initial position by a spring 60, Figs. 3 and 4, which is connected between the angular end 54 of the link 53 and a suitable part of the frame. This return movement of the bar 59 breaks the toggle and thus lowers the lever 30 and through it the ribbon.

By operating the lever 44, the pivot pin 39 may be shifted to a limited extent so as to change the angle between the arms of the toggle device when the toggle device is in broken position. If the arms of the toggle device make a smaller angle with one'another when broken, the straightening movement will prodevice is broken, and the lever 44 is commonly called the collar shift lever.

A controlling member or bar 6l, see Figs.

1, 2 and 8 particularly, is disposed against the under face of the base and confined thereagainst by headed screws or studs 62, which pass through slots 63 in the controlling member 6l into the base l. The slots 63 both have sections extending parallel to vone another in one direction, which may be endwise of the member, then obliquely to that direction and parallel to one another, and then in directions parallel to the first mentioned directions. The end sections of each slot 63 are therefore odset from one another, but are parallel to one another and connected by intermediate oblique sections.

When the member 6l is pulled endwise, such as by one grasping and pulling upon a handle or angular end 64` of the member 6l, the member 6l will have first a movement of translation first in one direction, then in a direction oblique thereto, and then in a further direction parallel to the first directi n of its movement. The member 6l is disposed along-,side of the rocking member 2l, so that when it moves in its oblique direction it will move edgewise against the adjacent edgeof the rocking member`2l, engage it on opposite sides of the pivot stud 22, and cam the member 2l into a neutral or intermediate position, shown in Fig. 2. Continued movement` of the member 6l carries the oblique sections of the slots 63 beyond the studs 62 and into the straight end sections, as shown in Fig. 2. Since Vthe pressure on the member 6l, by the member 21 is normal to its edge thestr'aight end sections of the slots 63 serve to'loclr the member 6l againml releasing movement which might be caused otherwise by pressure thereon from the rocking member 2l.

When the member 6l is returned to its initial position, the rocking member 2l is released and is free to roclr in either direction from the neutral position in whi chl it has been held, and engage either of the gears 24 with its related gear wheel 20a. l/lhile roclringmember 2l is held in itsneutrm position by the member 6l.v both gears 24 will be nisengaged from their gear wheels, and therefore the shaft 23 will rotate idly and c quently there will be no feeding of the ribl In order that the feeding of the ribbon will be continued automatically when the control member 61 is returned to initial or normal position, shown in F ig. l, the members 2l and 6l are provided with cooperating cam parts of surfaces which are effective by the return movement of member 6l to rock the member 21 in one direction and cause engagement of one gear 24 with its gear wheel 20a. For eX- ample the member 6l, which may be formed of ribbon metal, is provided with an angular bend or shoulder 65, Figs. l, 2, and 8, which is adapted to engage with a cam surface of the piece, or with a button or short stud 66, provided on the member 2l. Thus,

it will be observed thatV when the member 6l is moved to the right, in Fig. 2, the shoulder 65 will engage the button or stud 66, cam the rocking member 2l in a counter clockwise direction, and cause engagement of the gear 24 at the right hand'end (Fig. 2) of the shaft 23 with its adjacent gear wheelZOa.

From the foregoing it will be seen that when the controlling member 6l yis pulled outwardly, or the left in F l and 2, the ribbon feed will be incapacitated and the ribbon will not be fed endwise by the oper tion of the carriage or printing mechanism. l/Vhen the controlling member 6l is r turned to its normal position, the ribbon feeding action is again definitely re-establishe-d. In order to avoid having the ribbon vibrated intoVV printing position at each operation of the type bars when stencils are to be cut, provision has also been made for incapacitating the ribbon vibrating mechanism, and the means for this purpose will now be described. A bar or member 67 is provided `with a slot 68 which is slidingly mounted ou the stud 22 that forms the pivot of the rocking rmember 2l, with the bar or member 67 extending across the control member 6l tothe aperture 52 in the base. The bar or member 67 is then bent at right anglesv` continued along the slot- 52, and pivotally connected to the fulcrum pin 50 at the lower end of the lever 47. The bar 67 may move endwise of itself uponV the stud 22, and during such endwise movement will shift the fulcrum 50 of the lever 47 along the slot 5l. By reasons of this action, the lever 47 will have a limited angular movement about its connection to the toggle means through the pins 37 and 48 and the link 49.

During the shifting of the fulcrum pin 50, the toggle means will remain substantially unmoved, and therefore no material change in the position of the ribbon guide 2 will take place. When the fulcrum pin 50 is shifted along the slot 5l, however, the linlr 58 will be moved, by reason of its connection to the lever 47, in the direction in which it is operated by the universal bar 59. rllhe fulcrum pin 50 is normally at the end of the slot in wl ich it is shown in 3, at which time the universal bar 59 is in its position across the ends of the driver members ll of the printing mechanism. Any operation ofthe universal bar will then cause a straighteningof the toggle means and a movement of the ribbon into printing position.

When the fulcrum pin G is shifted into the opposite end of the slot 51, as shown in es? Fig. 4, the movement of the lever 47 which coeurs will shift the universal bar V59 into its osition shown in Fig. 4, at which time it is yond the range of movement of the driver members 11 of the printing mechanism. An operation of the printing mechanism then not cause an operation of the universal bar 59, and hence will not cause any movement of the ribbon vibrating mechanism, and therefore the ribbon will remain in its lower position, out of the printing zone. The

type on the type bars will then strike directly on the stencil sheet (not shown) as usual when stencils are being cut upon a t writer.

' n order to shift the fulcrum pin 50 to incapacitate the ribbon vibrating means when the ribbon feeding means is incapacitated, as shown in Fig. 2, the control member 61 may be provided with an operating pin 69, which 7 runs in a slot 70 provided in the portion of the bar 67 which crosses the member 61. The slot 70 has an intermediate oblique section which is crosswise of the directions in which the oblique sections of the slot 63 extend.

-` The end sections of the slot 7 0 extend in directions endwise of the member 61, and one' end section inclines slightly to the axes of the end sections of the slots 63.

A spring 71 is connected at one end to the bar 67 and at its other end is connected to the base 1, and urges the bar 67 yieldingly in a direction to shift the fulcrum pin into the sition shown in Fig. 3. lVhen the controling member 61 is operated in a direction to interrupt the ribbon feeding means, which is towards the position shown in Fig. 2, the movement of the pin 69 along the slot 70 will cause a movement of the bar 67 in a direction crosswise of the member 61 and will shift the fulcrum pin 50 along the slot 51 into the position shown in Figs. 2 and 4. v

After the pin 69 has cammed the bar 67 the desired distance it will enter the end of the slot 70 which inclines slightly toward the stud 22, and the spring 71 immediately Agives the bar 67 a slight return movement, as shown in Fig. 2. The slight inclination or obliqueness of the end of the slot 70 in which the pin 69 then stands, yieldingly resists endwise movement of the controlling member 61 and thus acts somewhat as a spring detent to prevent unintentional displacement of the controlling member 61 from the position shown in Fig. 2 where the typewriter is set tocut stencils.

In the operation of such a typewriter, the controlling member 61 will normally be in the position shown in Figs. 1 and S, and the ribbon feeding and vibrating means will be set to feed the ribbon step by step as required, and

to vibratev it into and out of printing position each time that the printing mechanism is operated. During continued operation of the typewriter under such conditions the member 21 Will be rocked at intervals to carry the gears 24 alternately into mesh with the gear wheels 20a, and cause reversals in the direction of travel of the ribbon, as set forth in my Patent No. 1,717,362 and also in my copending application S. N. 453,444 both hereinabove identified.

When one desires to cut or type stencils, instead of removing the ribbon in order to keep it out of printing position, and to avoid needless wear of the ribbon feeding mechanism when the ribbon is not in use, the typist merely grasps the handle 64 and pulls the controlling member 61 endwise from the position shown in Fig. 1 into the position shown in Figs. 2 and 8. This movement of the controlling member 61 as hereinabove explained, rocks the member 21 into the neutral position shown in Figs. 2 and 8. This interrupts the feeding of the ribbon and also incapacitates the ribbon vibrating means, so that upon operation of the printing mechanism to cut the stencils, the ribbon will remain out of printing position and stationary.

To re-set the typewriter for normal typewriting use, the typist merely returns the controlling member 61 from the position shown in Figs. 2 and 8 to the position shown in Fig. 1, by which the ribbon feeding and vibrating means will again be ready for operation.

It will be obvious that various changes in the details and arrangements of parts, which have been herein described and illustrated in order to explain the nature of the invention, may be made by those skilled in the art within the principle and scope of the invention, as expressed in the appended claims.

Claims:

1. A typewriter comprising a ribbon, type keys, means for holding said ribbon normally out of printing position and operable by said 'keys to shift said ribbon into and then out of printing position at each operation of a key,r1bbon reversing mechanism including a rocklng feed shaft and ribbon driving gear lli) wheels with which said shaft is alternately '--i engaged, and means operable to shift said shaft into neutral position in which it is out of driving engagement with both of said wheels, and also operable to incapacitate the ribbon shift-ing means While in normalV position, whereby said ribbon will remain stationary while said type keys are being operated to out a stencil.

2. VA typewriter comprising a ribbon, printing mechanism, ribbon vibrating means Vnormally holding the ribbon out of printing position and vibrating it into and out of printing position automatically at each operation of said printing mechanism, means for feeding the ribbon step by step at each operation of the printing mechanism, and means including a selectively operable, sliding control member having cam surfaces which guide it endwise and during a predetermined section of its travel impart thereto a lateral movement, for interrupting theaction of said feeding means and also for removing the ribbon vibrating means from the control of the printing mechanism, whereby said machine may be set to cut stencils merely by operation of said member.

3. A typewriter comprising a ribbon, print-- ing mechanism, ribbon vibrating means normally yholding the ribbon out of printing position and vibrating it. into andout of printing position automatically at each operation of said printing mechanism, means for feeding the ribbon step by step at each operation of the printing mechanism, means including a selectively operable, control memberV for linterrupting the action of said feeding means and also for removing the ribbon vibrating means from thecontrol of the printing mechanism, whereby said machine may be set to cut stencils merely by operation of said member, said means for interrupting thevfeeding of the ribbon upon operation of said member, being also operable by non-yielding connection to restore said ribbon feeding means positively to feeding condition automatically upon a return movement of said member.

4. A typewriter comprising a ribbon, printing mechanism, a ribbon vibrating device, means forfeeding said ribbon in either direction, including a pair of gear wheels and a rocking drive shaft having gears meshing alternately with said gear wheels upon rocking of said shaft, and control means including a common control element selectively operable when a stencil is to be cut for rockingsaid shaft into a neutral position in which its gears are out of mesh with both of said gear wheels to interrupt the feeding of said ribbon and for incapacitating said vibrating device.

5.. Al typewriter comprising a ribbon, printing mechanism, a ribbon vibrating device, means for feeding said ribbon in either direction, including a pair of gear wheels and a. rocking drive shaft having gears meshing alternately with said gear wheels upon rocking of said shaft, and control means including a common control element selectively operable when a stencil is to be cut for rocking said shaft into a neutral position in which its gears are out of mesh with both of said gear wheels to interrupt the feeding of said ribbon and for incapacita/ting said vibrating device, said control means also being operable upon said shaft to rock it in a direction to engage one of its gears with one of said gear wheels automatically when said control means is returned to normal position.

6. A typewriter comprising a ribbon, printing mechanism, means for vibrating the rib-v bon intoiand out of'printing position at yeach operation of printing mechanism, means for feeding the ribbon, means including a.V common controlling member operable to incapacitate said vibrating means and said feeding means when stencils are to be cut, and

means acting positively upon said feeding with said shaft into meshing engagement with said gear wheels alternately and during such oscillation moving through an intermediate neutral position in which the shaft is out of geared relation to both of said gear wheels, a reciprocating stencil controlling member mounted adjacent said rockable member shiftable laterally during an intermediate section of its endwise movement, normally clearing said rockable member to permit oscillation of the latter when said reciprocating member is at one end of its endwise movement, and operable selectively by said lateral shifting into a position in which it cams said rockable member into its neutral position from both limits of its rocking movement, whereby the feeding of said ribbon is interrupted when said controlling member is operated, and means for rotating said shaft about its own axis, said members having cooperating cam parts operable during the initial endwise movement of said control member, when the control member is returned to initial position in which it releases said rocking member, for camming said rocking member in one direction and causes a meshing of said gear means with one of said gear wheels. i

8. A typewriter comprising a ribbon, a frame, ribbon spool shafts mounted on said frame and having driving gears, ainemberrochably mounted on said'frame and having gear means thereon meshing alternately with said gear wheels, a control member having at different sect-ions thereof, parallel offset slots connected. by a slot oblique to the parallel slots, and studs passing through said slots and confining said control member to said frame and guiding it for movement first in one direction, then in a direction oblique to the iirst direction, and then in a direction parallel to the first direction during which movement in the oblique direction said control member engages said rocking member and cams it into a neutral position in which the gear means of said shaft is out of mesh with both gear wheels.

9. A typewriter comprising a ribbon,fa frame, ribbon spoolshafts'mounted on=said frame .and having driving gears, a member ear wheels, a control member having at di erent sections thereof, parallel offset slotsconneeted by a slot oblique to the paralof said vlei jslots, studs passing through said slots and rconfining said control member to said frame and guiding it for movement first in one direction, then in a direction oblique to the first direction, and then in a direction parallel to the first direction during which movement in the oblique direction said 'control member engages said rocking member and cams it into a neutral position in which the gear means of said shaft is out of mesh with Aboth gear wheels, ribbon vibrating means for shifting the ribbon into and out of rinting position, and means operable by sai control member for incapacitating said vibrating means when said control member is operated to shift the shaft into a neutral sition.

10. A typewriter comprising a ribbon, a vibrating guide through which said ribbon passes and by which the ribbon may be shifted into and out of printing position, toggle means connected to said guide for vibrating it into and out of printing position as the toggle means is straightened and broken, a lever pivotally connected at one end to said toggle means for straightening and breaking the toggle means, printing means, interponent mechanism between said lever and said printing mechanism whereby operation rinting mechanism oscillates said lever and causes a vibration of said ribbon into and out of said printing position, and means pivotally mounting the other end of said lever and operable to shift said other end of the lever about the connection to the tog le means and remove said interponent mec anism from the control of said printing means without disturbing said ribbon.

11. A typewriter comprising a ribbon, a vibrating guide through which said ribbon passes and by which the ribbon may be shifted into and out of printing position, toggle means connected to said guide for vibrating it into and out of printing position as the toggle means is straightened and broken, a lever pivotally connected at one end to said toggle means for straightening and brezil-:ing the toggle means, interponent mechanism between said lever and said printing mechanism whereby operation of said printing mechanism oscillates said lever and causes a' vibration of said ribbon into and out of said rinting position, means pivotally mounting the other end of said lever and operable to shift said other end of the lever a. out the connection to the toggle means and remove said interponent mechanism from the control of said printing means without disturbing said ribbon, ribbon feeding means, and means including a common controlling member for operating said pivotally mounted means to shift said other end of said lever in a direction to remove said interponent ymechanism from the control of the printing means, and also for incapacitating said feeding means.

l2. A typewriterV comprising printing means, a ribbon guide vmounted for movement in opposite directions, toggle means operable when straightened or broken for vibrating said ribbon guide, a lever pivotally connected on one end to said toggle means for straightening and breaking it, a universal bar operated by said printing means, a connection from said bar to said lever whereby the operation of said printing means will cause a vibration of said ribbon guide, pin and slot means mounting the other end of the lever with the slot running approximately normal to a theoretical radius from the slot to the pivotal connection of said lever to the toggle means, and means for shifting the adjacent end of said lever into different positions about the pivotal connection between the lever and tog le means, whereby said universal bar may e operated out of the path of said printing means without vibration of said ribbon guide when it is desired to cut stencils by said printing means.

13. A typewriter comprising printing means, a ribbon guide mounted for movement in opposite directions, toggle means operable when straightened or broken for vibrating said ribbon guide, a lever pivotally connected on one endk to said toggle means for straightenin and breaking it, a universal bar operate by said printing means, a connection from said bar to said lever Whereby the operation of said printing means will cause a vibration offsaid ribbon guide, pin and slot means mounting the other end of the lever with the slot running approximate` ly normal to a theoretical radius from the slot to the pivotal connection of said lever to the toggle means, means for shifting the adjacent end of said lever into different posi'- tions about the pivotal connection between the lever and toggle means, whereby said universal bar may be operated out of the path of said printing means without vibration of said ribbon guide ywhen it is desired to cut stencils by said printing means, ribbon feed ing means, and means operated by said lever shifting means for incapacitating said ribbon feeding means automatically when said lever is operated to shift the universal bar out of the control of said printing means whereby, during the cutting of stencils by the printing means, the vibration and feeding of the ribbon will be prevented.

14. A typewriter comprising printing means, a ribbon guide mounted for movement in opposite directions, toggle means operable when straightenedor broken for vibrating said ribbon guide, a lever pivotally connected on one end to said toggle means for straightening and breaking it, a universal bar operated by said printing means, a connection from said bar to said lever whereby the operation of said printing means will cause a vibration of said ribbon guide, pin and slot means mounting the other end of the lever with the slot ruiming approximately normal to a theoretical radius from the slot to the pivotal connection of said lever to the toggle means, a frame on which sait toggle means is mounted, a control element mounted on said frame for movement first in one direction then in a direction oblique to the rst direct-ion, then in a direction parallel to the first nirection, ribbon feeding means including a rocking member having a drive shaft rocking from a neutral position in which no feeding of the ribbon takes place into positions on opposite sides thereof in which the ribbon is fed in one direction or the other, said rocking member being engaged and operated into neutral position by operation of said control member in one direction, and a connection from said control member to the free end of said lever and causing movement of said other end of the lever in a direction to move said universal bar out of the zone of operation by said printing means when the control member operates said rocking member into neutral position.

i5. A typewriter comprising printing means, a ribbon guide mounted for movement in opposite directions, toggle means operable when straightened or broken for vibrating said ribbon guide, a lever pivotally connected on one end to said toggle means for straightening and breaking it, a universal bar operated by said printing means, a connection from said bar to said lever whereby the operation of said printing means will cause a. vibration of said ribbon guide, pin and slot means mounting the other end of the lever with the slot running approximately normal to a theoretical radius from the slot to the pivotal connection of said lever to the toggle means, a frame, a stencil control member mounted on said frame for a movement of translation first in one direction then in a direction oblique thereto, and then in a direction parallel to the first direction7 a bar having a pin and slot connection to said control member, the slot of said connection having an intermediate Zone which extends in a direction crosswise of the oblique direction of movement of said control member and having its end sections extending away from one another in opposite directions, said bar being mounted for movement crosswise of said control member and connected to the other end of said lever, whereby when said control member is moved in one direction said bar will be shifted in a direction to move said lever about its pivotal connection to said toggle means and place said universal bar out ofthe influence ofsaid printing means. f

16. A typewriter comprising a ribbon, a frame, ribbon spool shafts mounted on said frame and having driving gearwheels, a member rockably mounted on said frame and having gears thereon meshing alternately with said gear wheels when said member Vis rocked, a ypair of studs on said frame, a bar having slots through which said studs pass,

said slots having sections extending lirst in one direction, then in corresponding directions oblique thereto, and then in directions parallel to the first direction, whereby when said bar is operated to the extent permitted by said slots, said bar will have a movement of translation obliquely against said member, said bar being positioned to engage said memberon opposite sides of its pivot, whereby said bar engaging the member will rock said member into a neutral intermediate position in which its gears will be out of mesh with both of said gear Wheels and said member will be held in said neutral position by said bar.

17. A typewriter comprising a ribbon, a frame, ribbon spool shafts mounted on said frame and having driving gear wheels, a member roclrably mounted on said frame and having gears thereon meshing` alternately with said gear wheels when said member is rocked, a pair of studs on said frame, a bar having slots through which said studs pass, said. slots having sections extending lirst in one direction, then in corresponding directions oblique thereto, and then in directions parallel to the first direction, whereby when vsaid bar is operated to the extent permitted by said slots, said bar will have a movement of translation obliquely against said member, said bar being positioned to engage said member on opposite sides of its pivot, whereby said bar engaging the member will rock said member into a neutral intermediate position in which its gears will be out of mesh with both of said gear wheels and said member will be held in said neutral position by said bar, said member and bar also having cooperating cam portions effective, when said bar is returned to initial position, to rock said member in one direction and cause one of said gears to mesh with one of said gear wheels.

18. A typewriter comprising a ribbon, a ribbon guide, means for vibrating said guide to shift the ribbon into and out of printing position and including an operating lever pivotally connected thereto, printing means, interponent mechanism operable by said printing means and connected to said lever to oscillate it at each operation of the printing means, and means for shifting said lever about said pivotal connection to move said interponent mechanism out of the control of said printing means without material movement of Said ribbon, whereby said ribbon may be maintalned in one position While stencils are being cut by said printing means.

19. A typewriter comprising a ribbon, Y*

means for vibrating said ribbon into and out of rinting position, an operating lever pivots, ly connected at one end to said means, printin means, a universal bar operated by said printing means, means including a link connecting said universal bar to said lever` whereby operation of said printing means will cause a vibration of said ribbon, and means for shifting the fulcrum of said lever about said pivotal connection to move said universal bar beyond the range of operation of said printing means, whereby during subsequent operation of Vsaid printing means, said ribbon vibrating means will be inactive.

JOHN H. BARR. 

